Mercer Super chief executive Claire Ross will exit the $85 billion retail fund after less than two years at the helm.

The role is the last leg of Ross’ 17-year tenure with Mercer across three continents. Before becoming Mercer Super CEO in October 2024, she was chief operating officer at Mercer Pacific.

“Claire’s leadership and breadth of knowledge have been foundational to Mercer Super’s transformation over recent years,” David Bryant, Marsh’s Pacific CEO and president said in a media release.

During her time at Mercer, Ross oversaw the recruitment of chief investment officer Graeme Miller from TelstraSuper, and the growth of fund assets under management from $64 billion to $85 billion. It surpassed the threshold of one million members last year.

“Underpinning that growth is our ongoing investment program in personnel, technology, systems and processes which is strengthening the fund for the benefit of members”, Bryant said.

The fund was sued by corporate regulator ASIC in August 2025 for “systemic failures to report investigations into significant member services issues”, including incidents where insurance premiums continued to be charged after members had died, and only refunded later. It was ordered to pay $10.3 million in fines on 29 June by the Federal Court.

Mercer Pacific chief financial officer Court Haas will take up the top job at Mercer Super on an interim basis, while a global search is underway, overseen by trustee chair Jim Minto.